Malicious PDF — malware analysis report

Static analysis result for SHA-256 3bdb0b3c63eac359…

MALICIOUS

PDF

82.4 KB Created: 2021-09-18 06:03:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: 572ebaa236d59186d79497035b4c9945 SHA-1: ba41508c6218a1dd9f3758052231f2672e3a7565 SHA-256: 3bdb0b3c63eac35958c90e58f72d54dc096f552b3dfb71818622185ece6bc0e8
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF file was identified as malicious by ML classifiers and ClamAV, indicating a phishing or trojan payload. It contains a link farm pointing to compromised CMS uploads and disposable hosting, likely to distribute further malware or phish for credentials. The presence of multiple external URIs and the nature of the detected heuristics strongly suggest a malicious intent to redirect the user to harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9960

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL http://kaufdeinauto.de/wp-content/plugins/formcraft/file-upload/server/content/files/1613657df542a0---8761350233.pdf In PDF document text
    • http://www.leposeur.fr/site/upload/ckfinder/files/rovewenasikopugo.pdfIn PDF document text
    • http://hig-hegmann.de/userfiles/file/wivigigenoxugumizasim.pdfIn PDF document text
    • https://inverpalmas.com/aym_image/files/56817432375.pdfIn PDF document text
    • https://limsurempat.com/contents/files/fomefopixonedogerewepot.pdfIn PDF document text
    • https://galerie-louise.be/userfiles/files/busovitusipa.pdfIn PDF document text
    • https://crmsaas.dswip.com/ci/userfiles/files/xetaxobawibakijazoz.pdfIn PDF document text
    • https://cananalimdar.com/wp-content/plugins/super-forms/uploads/php/files/b71lm7t671fb1k4h64i6h505l4/13008492976.pdfIn PDF document text
    • https://vegastel.eu/components/com_mijoshop/opencart/image/data/files/fimajowujedovu.pdfIn PDF document text
    • https://fiscalonline.ro/app/webroot/files/userfiles/files/73267690258.pdfIn PDF document text
    • http://patriabrno.cz/userfiles/files/dewubobuwulutudetigevij.pdfIn PDF document text
    • http://lawcab.ru/wp-content/plugins/formcraft/file-upload/server/content/files/16135ae02807b3---32337814895.pdfIn PDF document text
    • http://lnianemarzenie.pl/userfiles/file/73713231210.pdfIn PDF document text
    • https://www.isnb.co.uk/wp-content/plugins/super-forms/uploads/php/files/c945d9cbdcaff08f1cace3d359921a55/zatipikevidakojovufi.pdfIn PDF document text
    • https://5ky13lu3-1251.com/contents/files/nakugabonesunudesafoti.pdfIn PDF document text
    • http://lezeckastenakosice.sk/upload/files/94097313016.pdfIn PDF document text
    • https://motodubai.com/uploaded_images/files/bipupam.pdfIn PDF document text
    • https://www.glasswindowequipment.com/wp-content/plugins/super-forms/uploads/php/files/9ff0adebc0998dae3694068cd3e6f421/23749432810.pdfIn PDF document text
    • http://xn--2osv9pt2jfpt.com/uploadfiles/files/wolaji.pdfIn PDF document text
    • http://zeci.nl/im/image/28398195296.pdfIn PDF document text
    • http://maslatalaia.com/userfiles/file/12127999148.pdfIn PDF document text
    • https://giorgiosantinelli.it/file/18658039043.pdfIn PDF document text
    • http://mamnonkitty.com/webroot/img/posts/files/45716874373.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/LPIa9PGmDLg/uplcv?utm_term=legendary+moonlight+sculptor+apkPDF link annotation
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000dbaa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDBAA 11224 bytes
SHA-256: a6410fdaf8f9455ce103d28be1e53cc00b0e3bfd199a50de59f673042ac8e852
font_01_sfnt_off0000f58d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF58D 17704 bytes
SHA-256: b275e88607f56c6948137c4fe426a48b93937427e94818a5fe9b631b89d910fa
font_02_sfnt_off000123b1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x123B1 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

Open this report in the interactive analyzer, or submit your own file for analysis.